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* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
.intel_syntax noprefix
.macro generate_lookup
.macro GENERATE_LOOKUP
$0:
test rdi, rdi
jz ret_nil
testq %rdi, %rdi
jz returnNilMethod
bt edi, 0
jc Ltagged_pointer_$0
testb $$1, %dil
jnz LtaggedPointer_$0
mov r8, [rdi]
mov r8, [r8+64]
movq (%rdi), %r8
movq 64(%r8), %r8
Lmain_$0:
mov rax, [rsi]
movzx ecx, ah
movzx edx, al
movq (%rsi), %rax
movzbl %ah, %ecx
movzbl %al, %edx
#ifdef OF_SELUID24
shr eax, 16
shrl $$16, %eax
mov r8, [r8+rax*8]
movq (%r8,%rax,8), %r8
#endif
mov r8, [r8+rcx*8]
mov rax, [r8+rdx*8]
movq (%r8,%rcx,8), %r8
movq (%r8,%rdx,8), %rax
test rax, rax
testq %rax, %rax
jz $1
ret
Ltagged_pointer_$0:
mov rax, [rip+_objc_tagged_pointer_secret@GOTPCREL]
xor rdi, [rax]
and dil, 0xE
movzx r8, dil
LtaggedPointer_$0:
movq _objc_taggedPointerSecret@GOTPCREL(%rip), %rax
xorq (%rax), %rdi
andb $$0xE, %dil
movzbl %dil, %r8d
mov rax, [rip+_objc_tagged_pointer_classes@GOTPCREL]
mov r8, [rax+r8*4]
mov r8, [r8+64]
movq _objc_taggedPointerClasses@GOTPCREL(%rip), %rax
movq (%rax,%r8,4), %r8
movq 64(%r8), %r8
jmp Lmain_$0
.endmacro
.macro generate_lookup_super
.macro GENERATE_LOOKUP_SUPER
$0:
mov r8, rdi
mov rdi, [rdi]
test rdi, rdi
jz ret_nil
movq %rdi, %r8
movq (%rdi), %rdi
testq %rdi, %rdi
jz returnNilMethod
mov r8, [r8+8]
mov r8, [r8+64]
movq 8(%r8), %r8
movq 64(%r8), %r8
jmp Lmain_$1
.endmacro
generate_lookup _objc_msg_lookup, _objc_method_not_found
generate_lookup _objc_msg_lookup_stret, _objc_method_not_found_stret
generate_lookup_super _objc_msg_lookup_super, _objc_msg_lookup
generate_lookup_super _objc_msg_lookup_super_stret, _objc_msg_lookup_stret
ret_nil:
lea rax, [rip+nil_method]
returnNilMethod:
leaq nilMethod(%rip), %rax
ret
nil_method:
mov rax, rdi
nilMethod:
xorq %rax, %rax
ret
|